Generally speaking, the "distinct" movement I mentioned is 0.3 division
(where 1 division is ~1cm). It varies a bit from amplifier to amplifier.
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: 03 November 2015 17:32
Subject: [TekScopes] Re: 7000-series Ch2 invert switch on vertical plug-ins
A spot check on my 7904 with the ch2 input grounded shows:
7A26 No1 no movement
7A26 No2 about 0.1 division movement
7A24 about 0.1 division movement, maybe less
All of these use the Tektronix IC amplifiers rather than discrete
transistors as in the 7A18. How big is your 'distinct' movement?